Railway-lamp.



N0. 878,986. PATENTED FEB. 11, 1908- A J. F. MQGANN.

RAILWAY LAMP. APPLICATION rum) DBO. 7. 1907.

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JOHN F. MCOANN, OF NEW YORK, N. Y.

RAILWAY-LAMP.

Specification of Letters Patent.

Patented Feb. 11, 1908.

Application filed December 7 1907. Serial No. 405.552.

which a current of cold air is conducted through the top of the lamp andthereby a suction exerted on the hot products of combustion generated bythe lamp so that said products are carried off in an effective mannerand thereby the steady and uniform burning of the lamp is produced; andfor this purpose the invention consists of a ventilating top forrailway-lamps which comprises a chimney-portion at the top of thelamp-casing, a conical portion on the same provided with a centralopening, a deflector of inverted conical shape located above the conicalportion, a semi-cylindrical shell extending from the base of the conicalportion to a point above the deflector, said shell being provided withan outlet-opening in its upper part, and a semi-cylindrical coverextending over the shell and forming with the latter transverse openingsat the front and rear-ends for taking the current ofcold air andcarrying along the hot products of combustion through the space betweenthe shell and cover throu h the opposite end to the outside, as will iefully described hereinafter and finally pointed out in the claims.

In the accompanying drawings, Figure 1 represents a perspective view ofa railwaylamp with my improved ventilating top, Fig. 2 is a verticallongitudinal section on line 2, 2, Fig. 1, and Fig. 3 is a verticaltransverse section on line 3, 3, Fig. 1.

Similar letters of reference indicate corresponding parts throughout theviews.

Referring to the drawings, a represents the casing of a railway-lamp ofany approved construction. To the top-part of tie same is 'applied myimproved ventilating top by means of a chimney-like portion 1) of ovalor cylindrical shape, to which is riveted or otherwise attached aconical portion (1 which is provided with a circular opening 11 in itsupper end. The conical portion (1 is connected at its outwardly-bentcircumference by means of rivets or other fastening devices with asemi-cylindrical shell 6 which is closed at the sides, as shown in Fig.3-, and which is attached by its flanged lower and bent-over ends to theriveted flanges of the chimney b and conical portion d. Thesemi-cylindrical shell 0 is provided with an oval o ening e at its upperend, the edge of the she along said opening being bent outwardly.

To the inside of the shell e is riveted or otherwise attached adeflector f, of inverted conical shape which is closed at the upper endand around which the hot products of combustion are drawn from theopening (1 of the cone (1 to the opening 6 of the semicylindrical shell6. Over the shell e extends an exterior cover 9 also of semi-cylindricalshape and concentric with the inner shell e, said shell inclosing aspace which is open at the lower front and rear-ends and closed at thesides so as to take up a current of cold. air at one or the otherend,according to the direction in which the locomotive, car or other vehicleto which the lamp is applied is moving or according to the direction ofthe wind. The cold air passes through'the space formed between theshells e and 9, over the opening 6 of the inner shell and out at theopposite end of the space between the shells e and g, and carries alongthe hot products of combustion delivered through the opening e andconducts them off without exerting a back-draft on the flame of thelamp. The cold air current produces a suction-action on the products ofcombustion and conducts them to the outside of the ventilating-top. Bythis arrangement the draft to which the top-part of the lamp issubjected by the quick motion of the locomotive or other vehicle, notonly does not interfere with the proper burning of the lamp so as tocause the uneven burning or flickering of the same, but, on thecontrary, keeps the flame steady as the suction exerted by the currentof air that passes through the space between the concentric shell andcover carries away the products of combustion and secures the shell andcover being provided with transprovided with an outlet-opening, aconical deflector within said shell, and a cover eX- tending over saidsemi-cylindrical shell, said verse openings at the frontand rear endsfor taking up a current of air at one end and carrying oil the productsof combustion at the opposite end.

2. The combination, with the casing of a railway-lamp, of achimney-portion attached to the top of the same, a conicalportion'attached to said chimney-portion and provided with an opening atits upper end, an interior semi-cylindrical shell attached to the baseof the conical portion, and provided with an outlet opening, a deflectorof inverted conical I shape attached to the inside of the shell, and asemi-cylindrical cover extending over the shell, said shell and coverbeing provided at their lower ends with transverse front andrear-openings so as to take up a current of cold air at one end andconduct it through the space between the shell and cover to the oppositeend and carry off the products of combustion of the lamp.

In testimony, that I claim the foregoing as my invention, I have signedmy name in presence of two subscribing witnesses.

JOHN F. MCCANN. Witnesses:

PAUL GOEPEL, HENRY J SUHRBIER.

